A Membrane Model Validation

The membrane model in the implemented ACM module was first validated with the experimental results of Pan (1986). In the experiments, the effect of varying stage cut (that is, the fraction of feed that permeates through the membrane) on mole fraction of H2 in the permeate was studied using asymmetric hollow fiber membranes in co- and counter-current configurations. Parameters of the membrane module can be found in Table lO.A.l stage cut varies from 0.34 to 0.55 in the counter-current configuration and from 0.35 to 0.6 in the 

The developed membrane model/ACM module was also validated against the results of Davis (2002). In his study, a mathematical model of a hollow-fiber membrane was developed in Aspen HYSYS for air separation. Parameters used in the simulation of this separation are given in Table 10.A.2. As can be seen in Table 10.A.3, the ACM model predictions are very close to the simulation results of Davis (2002), with a maximum difference of 0.41% in permeate O2 concentration. 

Feed composition (mole fraction) O2 Permeance (kmol/m -h-kPa) Nj Permeance (kmol/m -h-kPa) Membrane area (m ) 

Feed pressure (kPa) Feed temperature (°C) Permeate composition (mole fraction) Permeate pressure (kFti) 1034 21 O2 = 0.496 and Nj = 0.504 103.4 

Permeate composition (mole fraction) Propylene = 0.9877, Propane = 0.0122 and Isobutane = 0.0001 

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